cli: add pid subcommand

src/cli/pid.rs

@@ -0,0 +1,29 @@
+use {
+    crate::{
+        cli::GlobalArgs,
+        tools::tool_client::{Handle, ToolClient, with_tool_client},
+        wire::jay_compositor::{GetPid, Pid},
+    },
+    std::rc::Rc,
+};
+
+pub fn main(global: GlobalArgs) {
+    with_tool_client(global.log_level, |tc| async move {
+        let pid = Rc::new(P { tc: tc.clone() });
+        run(pid).await;
+    });
+}
+
+struct P {
+    tc: Rc<ToolClient>,
+}
+
+async fn run(p: Rc<P>) {
+    let tc = &p.tc;
+    let comp = tc.jay_compositor().await;
+    tc.send(GetPid { self_id: comp });
+    Pid::handle(tc, comp, (), |_, pid| {
+        println!("{}", pid.pid);
+    });
+    tc.round_trip().await;
+}